This section is from the book "Cyclopedia Of Architecture, Carpentry, And Building", by James C. et al. Also available from Amazon: Cyclopedia Of Architecture, Carpentry And Building.
The bases are usually circles and such a cylinder is called a circular cylinder, Fig. 77.
A right cylinder, Fig. 78, is one whose side is perpendicular to the bases.
The altitude of a cylinder is the perpendicular distance between the bases.
Fig. 77. Cylinder.
Fig. 78. Right Cylinder.
Fig. 79. Inscribed Cylinder.
A prism whose base is a regular polygon may be inscribed in or circumscribed about a circular cylinder, Fig. 79.